84% of US coastal wetlands are sinking as seas rise
A national study reveals that 84% of U.S. coastal wetlands are sinking or inundating due to rising sea levels caused by climate change. While some areas show resilience, many ecosystems are at risk of transforming into open water.
Why it matters
Coastal wetlands are critical for protecting infrastructure and supporting biodiversity; their loss threatens both environmental stability and human safety.
Fueled by climate change, sea levels have been rising faster than at any time in recent geologic history. This has led to an unusual race along three coasts of the contiguous US where coastal wetlands have been fighting for a slim chance of persisting. They are either lifting on newly accumulated sediments or moving inland as encroaching tides follow them at their heels.Now, the first national-level study of this competition has revealed that coastal wetlands which are among the country's most valuable ecosystems are losing ground with 84% of them gradually inundating, and many on track to transform into open water. Wetlands along the Gulf Coast are generally faring the worst, while certain stretches of the Atlantic Coast appear more resilient.
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